Mrazek, 21, made 21 saves on 24 shots in his season debut with the Griffins in a 4-3 shootout win last Saturday at Hamilton. In his rookie campaign with the team, he helped lead the Griffins to its first-ever Calder Cup championship with a 23-16-2 record, a 2.33 GAA and a 0.916 save percentage in 42 regular season games and a 15-9 record, a 2.31 GAA, a 0.916 save percentage and four shutouts in 24 postseason contests. The Ostrava, Czech Republic, native also appeared in two games for Detroit, sporting a 1-1 record, a 2.02 GAA and a 0.922 save percentage, as well as three games for the ECHL’s Toledo Walleye, posting a 2-1 record, a 2.02 GAA and a 0.944 save percentage.